Medium
Security advisory
In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists a potential open redirect vulnerability in Traefik's handling of the "X-Forwarded-Prefix" header. The Traefik API dashboard component doesn't validate that the value of the header "X-Forwarded-Prefix" is a site relative path and will redirect to any header provided URI. Successful exploitation of an open redirect can be used to entice victims to disclose sensitive information. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-15129
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:04 UTC · Revision 1
Source evidence
In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists a potential open redirect vulnerability in Traefik's handling of the "X-Forwarded-Prefix" header. The Traefik API dashboard component doesn't validate that the value of the header "X-Forwarded-Prefix" is a site relative path and will redirect to any header provided URI. Successful exploitation of an open redirect can be used to entice victims to disclose sensitive information. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.
osv:CVE-2020-15129
Complete source record
{
"id": "7a654f8d43caf93d9be69b3f8c4d5f942e230c715c9f34ec0813d870723e1808",
"url": "https://osv.dev/vulnerability/CVE-2020-15129",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-15129",
"summary": "In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists a potential open redirect vulnerability in Traefik's handling of the \"X-Forwarded-Prefix\" header. The Traefik API dashboard component doesn't validate that the value of the header \"X-Forwarded-Prefix\" is a site relative path and will redirect to any header provided URI. Successful exploitation of an open redirect can be used to entice victims to disclose sensitive information. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.",
"evidence": "osv:CVE-2020-15129",
"products": [],
"severity": "medium",
"structured": {
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"aliases": [
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"metrics": [
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],
"modified": "2026-10-20T10:52:47.473076253Z",
"provider": "osv",
"references": [
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"value": "CVE-2020-15129",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 383822,
"published_at": "2020-07-30T16:15:11.537+00:00"
}